Self-latching, semi-automatic door lock and opener

Abstract

A lock mechanism is disclosed for use with sliding, swinging or overhead doors. A receiver is affixed to the door frame and a bolt, linkage and handle are affixed to the door. The linkage allows the bolt to engage the receiver by sliding along the receiver until it becomes latched so that the door may be closed though the handle is locked. Pulling upon the unlocked handle retracts the bolt from the receiver and also causes the door to start opening.

I claim as my invention: 
     
       1. A self-latching, semi-automatic door lock and opener for a door slidably moveable relative to a door frame comprising, a pair of spring biased bolts attached to opposite sides of the door, a pair of bolt receiving means attached to opposite sides of the door frame and positioned to receive said bolts when said door is closed, a single cable extending between and attached to said bolts, guide means attached to said door and said cable passing therethrough, a recess formed in said door through which said cable passes, a handle cover member pivotally attached to said door so that it closes said recess when said handle-cover member is closed and said handle cover member pivotally mounted on a pivot shaft which is attached to said door and extends in the same direction of said cable, a hook attached to said handle cover member and said cable engaged by said hook within said recess, a locking pin attached to said door, and a female locking member attached to said handle cover member and engageable with said locking pin to lock said handle cover member to said door.